Employee Benefit Plans (Pension and Post Retirement Asset Allocations in Accordance with Investment Guidelines) (Details) - USD ($)
$ in Millions |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Notional |
$ 392,399
|
$ 366,091
|
|
| Pension Benefits |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
13,655
|
12,861
|
$ 12,541
|
| Net Value of investment of securities lending collateral invested in short-term bond |
411
|
627
|
|
| Liability for securities lending collateral |
411
|
627
|
|
| Pension Benefits | Equities | U.S. |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
631
|
538
|
|
| Pension Benefits | Equities | International |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
736
|
537
|
|
| Pension Benefits | Equities | Pooled separate accounts | U.S. |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
552
|
472
|
|
| Pension Benefits | Equities | Pooled separate accounts | International |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
365
|
269
|
|
| Pension Benefits | Equities | Common/collective trusts | U.S. |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
79
|
66
|
|
| Pension Benefits | Equities | Common/collective trusts | International |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
315
|
219
|
|
| Pension Benefits | Equities | United Kingdom insurance pooled funds | International |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
56
|
49
|
|
| Pension Benefits | Fixed Maturities |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
8,955
|
8,747
|
|
| Pension Benefits | Fixed Maturities | Pooled separate accounts |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
1,357
|
1,283
|
|
| Pension Benefits | Fixed Maturities | Common/collective trusts |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
509
|
441
|
|
| Pension Benefits | Fixed Maturities | Mortgage-backed |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
1
|
1
|
|
| Pension Benefits | Fixed Maturities | Other U.S. government securities |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
1,402
|
993
|
|
| Pension Benefits | Fixed Maturities | U.S. government securities (state & other) |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
556
|
521
|
|
| Pension Benefits | Fixed Maturities | Non-U.S. government securities |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
10
|
14
|
|
| Pension Benefits | Fixed Maturities | United Kingdom insurance pooled funds |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
324
|
305
|
|
| Pension Benefits | Fixed Maturities | Corporate bonds |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
3,622
|
4,039
|
|
| Pension Benefits | Fixed Maturities | Asset-backed |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
5
|
7
|
|
| Pension Benefits | Fixed Maturities | Collateralized Mortgage Obligations |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
492
|
506
|
|
| Pension Benefits | Fixed Maturities | Interest Rate Swaps |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
12
|
9
|
|
| Pension Benefits | Fixed Maturities | Variable Life Insurance Policies |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
47
|
39
|
|
| Pension Benefits | Fixed Maturities | Other |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
618
|
589
|
|
| Pension Benefits | Fixed Maturities | Unrealized gain (loss) on investment of securities lending collateral |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Short-term Investments |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
57
|
56
|
|
| Pension Benefits | Short-term Investments | Pooled separate accounts |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
56
|
55
|
|
| Pension Benefits | Short-term Investments | United Kingdom insurance pooled funds |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
1
|
1
|
|
| Pension Benefits | Real Estate |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
1,149
|
1,037
|
|
| Pension Benefits | Real Estate | Pooled separate accounts |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
714
|
666
|
|
| Pension Benefits | Real Estate | Partnerships |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
435
|
371
|
|
| Pension Benefits | Other |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
2,127
|
1,946
|
|
| Pension Benefits | Other | Partnerships |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
706
|
551
|
|
| Pension Benefits | Other | Hedge Fund |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
1,421
|
1,395
|
|
| Pension Benefits | NAV Practical Expedient |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
2,562
|
2,317
|
|
| Pension Benefits | NAV Practical Expedient | Equities | Pooled separate accounts | U.S. |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | NAV Practical Expedient | Equities | Pooled separate accounts | International |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | NAV Practical Expedient | Equities | Common/collective trusts | U.S. |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | NAV Practical Expedient | Equities | Common/collective trusts | International |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | NAV Practical Expedient | Equities | United Kingdom insurance pooled funds | International |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | NAV Practical Expedient | Fixed Maturities | Pooled separate accounts |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | NAV Practical Expedient | Fixed Maturities | Common/collective trusts |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | NAV Practical Expedient | Fixed Maturities | Mortgage-backed |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | NAV Practical Expedient | Fixed Maturities | Other U.S. government securities |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | NAV Practical Expedient | Fixed Maturities | U.S. government securities (state & other) |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | NAV Practical Expedient | Fixed Maturities | Non-U.S. government securities |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | NAV Practical Expedient | Fixed Maturities | United Kingdom insurance pooled funds |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | NAV Practical Expedient | Fixed Maturities | Corporate bonds |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | NAV Practical Expedient | Fixed Maturities | Asset-backed |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | NAV Practical Expedient | Fixed Maturities | Collateralized Mortgage Obligations |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | NAV Practical Expedient | Fixed Maturities | Interest Rate Swaps |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | NAV Practical Expedient | Fixed Maturities | Variable Life Insurance Policies |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | NAV Practical Expedient | Fixed Maturities | Other |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | NAV Practical Expedient | Fixed Maturities | Unrealized gain (loss) on investment of securities lending collateral |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | NAV Practical Expedient | Short-term Investments | Pooled separate accounts |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | NAV Practical Expedient | Short-term Investments | United Kingdom insurance pooled funds |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | NAV Practical Expedient | Real Estate | Pooled separate accounts |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | NAV Practical Expedient | Real Estate | Partnerships |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
435
|
371
|
|
| Pension Benefits | NAV Practical Expedient | Other | Partnerships |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
706
|
551
|
|
| Pension Benefits | NAV Practical Expedient | Other | Hedge Fund |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
1,421
|
1,395
|
|
| Pension Benefits | Level 1 |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
578
|
533
|
|
| Pension Benefits | Level 1 | Equities | Pooled separate accounts | U.S. |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 1 | Equities | Pooled separate accounts | International |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 1 | Equities | Common/collective trusts | U.S. |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 1 | Equities | Common/collective trusts | International |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 1 | Equities | United Kingdom insurance pooled funds | International |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 1 | Fixed Maturities | Pooled separate accounts |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 1 | Fixed Maturities | Common/collective trusts |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 1 | Fixed Maturities | Mortgage-backed |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 1 | Fixed Maturities | Other U.S. government securities |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 1 | Fixed Maturities | U.S. government securities (state & other) |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 1 | Fixed Maturities | Non-U.S. government securities |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 1 | Fixed Maturities | United Kingdom insurance pooled funds |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 1 | Fixed Maturities | Corporate bonds |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 1 | Fixed Maturities | Asset-backed |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 1 | Fixed Maturities | Collateralized Mortgage Obligations |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 1 | Fixed Maturities | Interest Rate Swaps |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 1 | Fixed Maturities | Variable Life Insurance Policies |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 1 | Fixed Maturities | Other |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
578
|
533
|
|
| Pension Benefits | Level 1 | Fixed Maturities | Unrealized gain (loss) on investment of securities lending collateral |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 1 | Short-term Investments | Pooled separate accounts |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 1 | Short-term Investments | United Kingdom insurance pooled funds |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 1 | Real Estate | Pooled separate accounts |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 1 | Real Estate | Partnerships |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 1 | Other | Partnerships |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 1 | Other | Hedge Fund |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 2 |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
9,723
|
9,260
|
|
| Pension Benefits | Level 2 | Equities | Pooled separate accounts | U.S. |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
552
|
472
|
|
| Pension Benefits | Level 2 | Equities | Pooled separate accounts | International |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
365
|
269
|
|
| Pension Benefits | Level 2 | Equities | Common/collective trusts | U.S. |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
79
|
66
|
|
| Pension Benefits | Level 2 | Equities | Common/collective trusts | International |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
315
|
219
|
|
| Pension Benefits | Level 2 | Equities | United Kingdom insurance pooled funds | International |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
56
|
49
|
|
| Pension Benefits | Level 2 | Fixed Maturities | Pooled separate accounts |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
1,319
|
1,247
|
|
| Pension Benefits | Level 2 | Fixed Maturities | Common/collective trusts |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
509
|
441
|
|
| Pension Benefits | Level 2 | Fixed Maturities | Mortgage-backed |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
1
|
1
|
|
| Pension Benefits | Level 2 | Fixed Maturities | Other U.S. government securities |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
1,402
|
993
|
|
| Pension Benefits | Level 2 | Fixed Maturities | U.S. government securities (state & other) |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
556
|
521
|
|
| Pension Benefits | Level 2 | Fixed Maturities | Non-U.S. government securities |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
10
|
14
|
|
| Pension Benefits | Level 2 | Fixed Maturities | United Kingdom insurance pooled funds |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
324
|
305
|
|
| Pension Benefits | Level 2 | Fixed Maturities | Corporate bonds |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
3,621
|
4,039
|
|
| Pension Benefits | Level 2 | Fixed Maturities | Asset-backed |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
5
|
7
|
|
| Pension Benefits | Level 2 | Fixed Maturities | Collateralized Mortgage Obligations |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
492
|
506
|
|
| Pension Benefits | Level 2 | Fixed Maturities | Interest Rate Swaps |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
12
|
9
|
|
| Pension Benefits | Level 2 | Fixed Maturities | Variable Life Insurance Policies |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
47
|
39
|
|
| Pension Benefits | Level 2 | Fixed Maturities | Other |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
1
|
7
|
|
| Pension Benefits | Level 2 | Fixed Maturities | Unrealized gain (loss) on investment of securities lending collateral |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 2 | Short-term Investments | Pooled separate accounts |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
56
|
55
|
|
| Pension Benefits | Level 2 | Short-term Investments | United Kingdom insurance pooled funds |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
1
|
1
|
|
| Pension Benefits | Level 2 | Real Estate | Pooled separate accounts |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 2 | Real Estate | Partnerships |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 2 | Other | Partnerships |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 2 | Other | Hedge Fund |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 3 |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
792
|
751
|
|
| Pension Benefits | Level 3 | Equities | Pooled separate accounts | U.S. |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 3 | Equities | Pooled separate accounts | International |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 3 | Equities | Common/collective trusts | U.S. |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 3 | Equities | Common/collective trusts | International |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 3 | Equities | United Kingdom insurance pooled funds | International |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 3 | Fixed Maturities | Pooled separate accounts |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
38
|
36
|
|
| Pension Benefits | Level 3 | Fixed Maturities | Common/collective trusts |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 3 | Fixed Maturities | Mortgage-backed |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 3 | Fixed Maturities | Other U.S. government securities |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 3 | Fixed Maturities | U.S. government securities (state & other) |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 3 | Fixed Maturities | Non-U.S. government securities |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 3 | Fixed Maturities | United Kingdom insurance pooled funds |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 3 | Fixed Maturities | Corporate bonds |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
1
|
0
|
|
| Pension Benefits | Level 3 | Fixed Maturities | Asset-backed |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 3 | Fixed Maturities | Collateralized Mortgage Obligations |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 3 | Fixed Maturities | Interest Rate Swaps |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 3 | Fixed Maturities | Variable Life Insurance Policies |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 3 | Fixed Maturities | Other |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
39
|
49
|
|
| Pension Benefits | Level 3 | Fixed Maturities | Unrealized gain (loss) on investment of securities lending collateral |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 3 | Short-term Investments | Pooled separate accounts |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 3 | Short-term Investments | United Kingdom insurance pooled funds |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 3 | Real Estate | Pooled separate accounts |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
714
|
666
|
|
| Pension Benefits | Level 3 | Real Estate | Partnerships |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 3 | Other | Partnerships |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Pension Benefits | Level 3 | Other | Hedge Fund |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
1,615
|
1,531
|
$ 1,584
|
| Other Postretirement Benefits | Equities | U.S. |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
789
|
676
|
|
| Other Postretirement Benefits | Equities | International |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
216
|
186
|
|
| Other Postretirement Benefits | Equities | Common/collective trusts | U.S. |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
182
|
170
|
|
| Other Postretirement Benefits | Equities | Common/collective trusts | International |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
110
|
96
|
|
| Other Postretirement Benefits | Equities | Equities | U.S. |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
2
|
|
|
| Other Postretirement Benefits | Equities | Variable Life Insurance Policies | U.S. |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
605
|
506
|
|
| Other Postretirement Benefits | Equities | Variable Life Insurance Policies | International |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
106
|
90
|
|
| Other Postretirement Benefits | Fixed Maturities |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
553
|
555
|
|
| Other Postretirement Benefits | Fixed Maturities | Common/collective trusts |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
52
|
59
|
|
| Other Postretirement Benefits | Fixed Maturities | Other U.S. government securities |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
87
|
78
|
|
| Other Postretirement Benefits | Fixed Maturities | Non-U.S. government securities |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
2
|
2
|
|
| Other Postretirement Benefits | Fixed Maturities | Corporate bonds |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
151
|
176
|
|
| Other Postretirement Benefits | Fixed Maturities | Asset-backed |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
28
|
49
|
|
| Other Postretirement Benefits | Fixed Maturities | Collateralized Mortgage Obligations |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
29
|
27
|
|
| Other Postretirement Benefits | Fixed Maturities | Other collateralized loans |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
30
|
|
|
| Other Postretirement Benefits | Fixed Maturities | Interest Rate Swaps |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
|
1
|
|
| Other Postretirement Benefits | Fixed Maturities | Variable Life Insurance Policies |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
163
|
157
|
|
| Other Postretirement Benefits | Fixed Maturities | Other |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
11
|
6
|
|
| Other Postretirement Benefits | Short-term Investments |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
57
|
114
|
|
| Other Postretirement Benefits | Short-term Investments | Registered investment companies |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
57
|
114
|
|
| Other Postretirement Benefits | NAV Practical Expedient |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | NAV Practical Expedient | Equities | Common/collective trusts | U.S. |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | NAV Practical Expedient | Equities | Common/collective trusts | International |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | NAV Practical Expedient | Equities | Equities | U.S. |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
|
|
| Other Postretirement Benefits | NAV Practical Expedient | Equities | Variable Life Insurance Policies | U.S. |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | NAV Practical Expedient | Equities | Variable Life Insurance Policies | International |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | NAV Practical Expedient | Fixed Maturities | Common/collective trusts |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | NAV Practical Expedient | Fixed Maturities | Other U.S. government securities |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | NAV Practical Expedient | Fixed Maturities | Non-U.S. government securities |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | NAV Practical Expedient | Fixed Maturities | Corporate bonds |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | NAV Practical Expedient | Fixed Maturities | Asset-backed |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | NAV Practical Expedient | Fixed Maturities | Collateralized Mortgage Obligations |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | NAV Practical Expedient | Fixed Maturities | Other collateralized loans |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
|
|
| Other Postretirement Benefits | NAV Practical Expedient | Fixed Maturities | Interest Rate Swaps |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
|
0
|
|
| Other Postretirement Benefits | NAV Practical Expedient | Fixed Maturities | Variable Life Insurance Policies |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | NAV Practical Expedient | Fixed Maturities | Other |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | NAV Practical Expedient | Short-term Investments | Registered investment companies |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | Level 1 |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
63
|
115
|
|
| Other Postretirement Benefits | Level 1 | Equities | Common/collective trusts | U.S. |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | Level 1 | Equities | Common/collective trusts | International |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | Level 1 | Equities | Equities | U.S. |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
|
|
| Other Postretirement Benefits | Level 1 | Equities | Variable Life Insurance Policies | U.S. |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | Level 1 | Equities | Variable Life Insurance Policies | International |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | Level 1 | Fixed Maturities | Common/collective trusts |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | Level 1 | Fixed Maturities | Other U.S. government securities |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | Level 1 | Fixed Maturities | Non-U.S. government securities |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | Level 1 | Fixed Maturities | Corporate bonds |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | Level 1 | Fixed Maturities | Asset-backed |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | Level 1 | Fixed Maturities | Collateralized Mortgage Obligations |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | Level 1 | Fixed Maturities | Other collateralized loans |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
|
|
| Other Postretirement Benefits | Level 1 | Fixed Maturities | Interest Rate Swaps |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
|
0
|
|
| Other Postretirement Benefits | Level 1 | Fixed Maturities | Variable Life Insurance Policies |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | Level 1 | Fixed Maturities | Other |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
6
|
1
|
|
| Other Postretirement Benefits | Level 1 | Short-term Investments | Registered investment companies |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
57
|
114
|
|
| Other Postretirement Benefits | Level 2 |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
1,543
|
1,405
|
|
| Other Postretirement Benefits | Level 2 | Equities | Common/collective trusts | U.S. |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
182
|
170
|
|
| Other Postretirement Benefits | Level 2 | Equities | Common/collective trusts | International |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
110
|
96
|
|
| Other Postretirement Benefits | Level 2 | Equities | Equities | U.S. |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
2
|
|
|
| Other Postretirement Benefits | Level 2 | Equities | Variable Life Insurance Policies | U.S. |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
605
|
506
|
|
| Other Postretirement Benefits | Level 2 | Equities | Variable Life Insurance Policies | International |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
106
|
90
|
|
| Other Postretirement Benefits | Level 2 | Fixed Maturities | Common/collective trusts |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
52
|
59
|
|
| Other Postretirement Benefits | Level 2 | Fixed Maturities | Other U.S. government securities |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
87
|
78
|
|
| Other Postretirement Benefits | Level 2 | Fixed Maturities | Non-U.S. government securities |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
2
|
2
|
|
| Other Postretirement Benefits | Level 2 | Fixed Maturities | Corporate bonds |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
151
|
176
|
|
| Other Postretirement Benefits | Level 2 | Fixed Maturities | Asset-backed |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
28
|
48
|
|
| Other Postretirement Benefits | Level 2 | Fixed Maturities | Collateralized Mortgage Obligations |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
27
|
22
|
|
| Other Postretirement Benefits | Level 2 | Fixed Maturities | Other collateralized loans |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
28
|
|
|
| Other Postretirement Benefits | Level 2 | Fixed Maturities | Interest Rate Swaps |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
|
1
|
|
| Other Postretirement Benefits | Level 2 | Fixed Maturities | Variable Life Insurance Policies |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
163
|
157
|
|
| Other Postretirement Benefits | Level 2 | Fixed Maturities | Other |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | Level 2 | Short-term Investments | Registered investment companies |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | Level 3 |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
9
|
11
|
|
| Other Postretirement Benefits | Level 3 | Equities | Common/collective trusts | U.S. |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | Level 3 | Equities | Common/collective trusts | International |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | Level 3 | Equities | Equities | U.S. |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
|
|
| Other Postretirement Benefits | Level 3 | Equities | Variable Life Insurance Policies | U.S. |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | Level 3 | Equities | Variable Life Insurance Policies | International |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | Level 3 | Fixed Maturities | Common/collective trusts |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | Level 3 | Fixed Maturities | Other U.S. government securities |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | Level 3 | Fixed Maturities | Non-U.S. government securities |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | Level 3 | Fixed Maturities | Corporate bonds |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | Level 3 | Fixed Maturities | Asset-backed |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
1
|
|
| Other Postretirement Benefits | Level 3 | Fixed Maturities | Collateralized Mortgage Obligations |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
2
|
5
|
|
| Other Postretirement Benefits | Level 3 | Fixed Maturities | Other collateralized loans |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
2
|
|
|
| Other Postretirement Benefits | Level 3 | Fixed Maturities | Interest Rate Swaps |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
|
0
|
|
| Other Postretirement Benefits | Level 3 | Fixed Maturities | Variable Life Insurance Policies |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
0
|
0
|
|
| Other Postretirement Benefits | Level 3 | Fixed Maturities | Other |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
5
|
5
|
|
| Other Postretirement Benefits | Level 3 | Short-term Investments | Registered investment companies |
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
| Total |
$ 0
|
$ 0
|
|